Traction-tire.



T. HATTORI.

TRACTION TIRE.

APPUCATION FILED NOV. 3. mm.

[267,219. Patented May 21, 1918.

2 SHEETS SHEET 1.

5111 w n fa:

TAKAJI m'rrom, oi-rnnnows, cuzio I TRACTION-TIRE.

Tonll whom it may concern:

Be it nown that I, TAKAJI HATIORI, a subject of the Emperor of Japan,residing at Fellows, in the county of Kern and State of California,have. invented new and useful Improvements in Traction-Tires, ofwhich'the followin is a specification.

'This invention re ates to traction wheels, and more especiallyto-detachilble traction tires; and the object of the same is to producea tire of this class which ma be applied to the soft tire of an automobie wheel, whether the last named tire is of the pneumatic or cushiontype, without taking such soft tire oh the wheel or changing theconstruction of parts.

This object is accomplished b attaching the traction tire to theautomo'ile tire by means of clips and bolts which hold it from radialmovement outward, and b extension spokes which hold it from radiamovement inward: If the soft tire be of the pneumatic type, a two-partsaddle is interposed between itand the traction tire, whereas the saddlemaybe omitted if the soft tire is of the cushion type. Two types of myinvention are illustrated in the accompanying drawings wherein Figure 1is a side elevation and Fig. 2 h transverse section of a wheel equippedwith this tire and partly broken away.

Fig. 3 is a perspective detail of one of the tire sectors. takensomewhat from the in side.

Fig. 4- is a perspective detail of one of the extension spokes on arather larger scale, and Fig. 5 is a detail of the spoke grips and itsparts.

Fi 6 is a side elevation partly in section, timid T a transverse sectionof a wheel having a cushion tire, the same being aippmr with thisinvention; and Fig. 8 is acrossrsectional detail on a larger scale.

Them-heel may be briefly described as composed of a hub H from whichradiate spokes S connected at theirouter ends to a folly-F, arid aroundthe saine is a rim R which in the first type of my invention carries apneumatic tire P, while in the second type bfmy invention it carries asolid or cushion tire Ceither being referred to herein as the soft tire.Let us assume that it is desired to apply a traction tread or tire to awheel of this kind without interfering with the soft tire.

The traction tire T is made in sectors 1,

' tion may be attached at a proper oint to the Specification of LettersPatent.

Application cleane mb r a, 1917. sci-n1 110,200,218. p

' Patented May 21, 1918;

usually about four to the circle, and their meeting ends 2 are beveledor undercut on complementary inclines as seen in Fi 1, so that when thewheel rotates in the direction of the arrow 3 mud and. dirt will not getbetween the ends. The face of the tire may be provided with ribs 4 ofany approved shape to give it proper traction or cling upon the roadwayor soft earth. The tire should be. considerably broader than the softtire which it is designed to cover, and its body at intervals isprovided with parallel slots 5 near its edge. Over the felly between thespokes are placed wear plates 8 and across t iese plates are passed theupbent centers of cl'p plates 6 having holes near their outer ends.Bolts 7 are now passed inward through the slots 5 and the holes in theclip plates and nuts applied to their inner ends and ti htened. Thisstructure is shown in both F lgs. 2 and 8, and comprises the means forholding the tire T in ward toward the soft tire. Extension spokes 10(see Fig. 4) are employed, one for each wheel spoke l. The upper portionof each extension is pierced with an eye 11 below which it is outbent asat 12, and its lower portion is turned outward into a foot 13 piercedwith a hole ll through which passes a bolt 15 which also extends throughthe tire T and preferably has its head at the outside of the latter. InFig. 5 is shown a spoke grip, whereof two are used for each cxtensiomThe wheel spoke S will be wrapped with tire tape or other cushion toprevent it becoming scratched and this spoke grip applied. It is made upof two members 16 and 17 hingedly connected at oneside as at 18, onemember having a recess 19 at the other side and a. threaded stud 20projecting beyond its recess, and the other member having a lip 21fitting in said recess as shown. A collar 22 is next slipped past thestud'QO and emhracesthe lip and the oon- '10( tiguous part of theothermember to hold the two members assembled, then the stud is passedthrough the eye 11 in the extension 10, and eventually awasher 23 and anut 2-1 are applied to the outer end of the stud whorl spoke carries oneof these spoke grips near the folly and it holds the extension veryrigidly thereto so that its radially outer por tire T. Substantially thesame ype ofextension is shown in Figs. 6 and 7,

' tireP is employed, there must be a saddle interposed between it andthe steel tire T. This saddle is made in two members, per haps best seenin Figs. 2 and 3, and each member is made in sectors perhaps, althoughnot necessarily, equal in number with the sectors of the tire T, and isa plied at one side of the soft tire before t 0 spoke extensions are uton and, in fact, before the steel tire T 1S put on. Eachseo tion is oflight sheet metal, and of course has the proper curvature to conformwith the size of the tire P. It comprises it flat tread 30 whereof oneed 0 31 is coincident with the edge of the stee tire T, and at its otheredge it is bent as at 32 in an acute angle and carried inward and upwardin what I will call a trough 33 which conforms with about one-quarter ofthe transverse curvature of the soft tire. The member at the inner sideof the wheel has a somewhat narrower tread than that at the outerside,as best seen in Fig. 2, and the result is that the soft tire does notstand exactly over the transverse center of the steel tire. This I dopurposel because on some automobiles and motor vehicles the wheel runsso close to the framework on the inside that if a rather wide tractortire were applied centrally to the soft tire, it would strike some partof the structure at the inside of each wheel. Again, I prefer that therebe space at the outside of the soft tire to fasten the feet 13 of theextensions to the outer edge of the steel tire. The bolts 15 whicheffect this fastening pass through holes in the tread of the saddle, andtie or clip bolts 7 above-described also pass through the members of thesaddle and hold them in place.

lVhen now their nuts are tightened. up, the threads of the two membersof the saddle are held in strict alinement because the are riveted uponthe inner face of the stee tire with cushion; tireswhich-aresubstantially the same size andshapeas the pneumatic tires. I wouldnottherefore be limited in this respect.

said eye and receivi What I claim as new is:

'1. In a traction tire for attachment to the wheel and soft tire of amotor-vehicle, the combination with a steel tread made in sectors andhaving slots near its side edges, the ends of the sectors being beveledon meetin lines; of wear plates passing over the fe y between thespokes, clip plates whose centers overliesaid wear plates and whose endshave eyes, and bolts assing through the slots in the tread and t roughng nuts inside the ends the 'clip plates.

' .iln'a traction tire for attachment to the wheel and soft tire of amotor-vehicle, the combination with a steel tread made in sectors andhaving slots near its side edges, the ends of the sectors being beveledon meetin lines; of wear plates passing over the fe ly between thespokes, clip plates whose centers overlie said wear plates and whoseends have eyes, and bolts passing through the slots in the tread andthrough said eyes and receiving nuts inside the ends of the clip plates;and an extension spoke whose inner end attached tn each wheel-spoke andwhose outer end has a foot bolted to said tread near its outer edge. l

3. The herein described means for at tachin a steel tread to amotor-vehicle wheel aving a soft tire, the same comprising clip platespassing over the felly between the spokes, tie olts connecting the endsof the clip plates with said steel tread for preventing the movement of:the latter radially outward; extension spokes having feet at theirouter ends bolted to said tread and their inner ends lying along thewheel spokes, and spoke rips. embracing the, latter and having stu spassing through said extension spokes for preventing the tread frommoving radially inward on the wheel. 4. In a device for attaching asteel tread to the soft tire of an automobile Wheel, the combinationwith glip plates overlying the felly and connected with the edges ofsaid tread for preventing the'latter from moving radially outwar andextension spokes connected with the wheel s okes and havin their outerends connected with said tree for preventing the latter from movingradin ly inward; of' a two part saddle whereof each art has a treadunderlying said steel tread and a trough lying against the softtire.

In testimon ture.

fiertaif I, ailix my sig- TAKAJI HATTORI.

